I am perfectly happy to be called U about this, genuinely torn. We live hundreds of miles from DH's family (and thousands from mine). We were invited to a wedding near his parents and DH asked if we could go (DH, DD and I). I said, "yes" thinking we would be going for maybe three days. DH booked us onto a night flight
and for five nights. A bit of a shock but OK. His DSis and family (four of them) are also going and we are all supposed to be staying with DMiL and DFiL. They have three bedrooms upstairs and a bedroom downstairs. DMiL has been very, very ill recently (part of the reason DH wants to visit).
The AIBU comes now... I want to book into a hotel. At least for a couple of the nights. We will be in a small space with three children (ours is a baby and the others are older so want to 'play' with her all the time), a huge dog (who wants to lick the baby all the time), sick MiL (who wants to move out of her room to accommodate us all) and FiL (who is lovely but finding MiL's illness really hard and has some issues of his own).
DH doesn't want to ask his parents if it is OK for us to stay in a hotel because he thinks they will get offended. It is also going to be a lot of cash. I think it is better to have the conversation now rather than do it his way and have the outcome I think will happen. DD will get out of routine and grumpy so she will be miserable, which means I will be miserable. MiL won't be able to cope with everyone and will get tired, sick and unhappy. DH, DSis and MiL will fight (they love each other but have previous for this). They will have a crappy time and it will spoil things.
So as not to drip feed; DH hasn't come the last two times to my family; I have to go with DD as they want to see her and she is BF; I love them all and am lucky to have such a great second family; MiL is very sick so this may be one of the last times we all get together; the bloody wedding is child-free (which the invitation didn't mention so I am going all this way and no wedding).